Home / 5,172.13-7,139.18-3,309.13

Finding the Fourth Proportional to 5,172.13, 7,139.18 and 3,309.13

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Solution

The fourth proportional to 5,172.13, 7,139.18 and 3,309.13 is: 4,567.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.13 : 7,139.18 = 3,309.13 : x
  2. Step 2: Convert to fraction form
    5,172.13/7,139.18 = 3,309.13/x
  3. Step 3: Cross multiply
    5,172.13x = 7,139.18 × 3,309.13
  4. Step 4: Simplify right side
    5,172.13x = 23,624,474.71
  5. Step 5: Solve for x
    x = 23,624,474.71/5,172.13
  6. Step 6: Final answer
    x = 4,567.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.